Examiner



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JOHN NAGIELE; 0F DUNOANSYILLE, PENNSYLVANIA, i Lettei-a'Pqtent No. 62,770, q'tea'mwz, 12, 1867.

ImPsovEMsuti'm THE MANUFACTURE 'or ARTIFICIAL STONE.

5 TO ALL WHOM IT MAY CONCERN;

Be it known that I, JQHN NAGELE, of Duncansville, in the county of Blair, and State of Pennsylvania, have invented a new Composition of Artificial Stone; and Ido hereby declare the following to be an exact description thereof.

The object of my invention is the manufacturing of a cheap and ornamental stone for roofing, paving, and ornamental purposes, made by heavy pressure under water, and I use the following ingredients:

One part of cement, one part of washed gravel, and one partof sharp washed sand. I

I The cement is composed of s i l i 2ate of lime, r agp esg, o i ide o firon and al umiuate o fllin qwhich, in a high degree, possess the quality of hardening under water in a. short time as hard as stone. The whole composition is thoroughly mixed and putiinder water under a heavy pressure for forty-eight hours, when the stone is ready to be made use of, as a hard, firm, and compact stone, suitable for buildings and ornamental purposes,'and most useful on account of its-cheapness and durability, and as an article ofemanufacture What I claim as my invention, and desire to secure by Letters Patent, is-

The composition of the ingredients when used in the quantities as herein described, and placed under water r under a heavy pressure for the purpose of producing a cheap and durable artificial stone.

. JOHN NAGELE.

i Witnesses:

JNo. Cassuans, Jr.,- D. L. Mums.

EXAMINER 

